Natural pre-washed cotton: is made of 100% cotton, which is safe and skin-friendly and your family. The pre-washing process makes the fabric have excellent comfort and keep it comfortable for many years. Comfortable in all seasons: This carpet can be used in any season and is an essential household item in . It is breathable, hygroscopic and moderately warm. It is very suitable for use in spring and summer. It can the cold, but it 't make you sweat in hot days. It can also keep warm in autumn and winter.